This site is supported by donations to The OEIS Foundation.

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A169738 Base 10 numbers d_1 d_2 ... d_k such that the digits d_i are distinct and not zero, and Sum_{i=1..k-1} d_i^i = d_k^k. 1
 42, 93, 253, 712, 6312, 9823, 714523, 781523 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 6312 is in the sequence because 6^1+3^2+1^3=2^4, and 781523 is in the sequence because 7^1+8^2+1^3+5^4+2^5=3^6. MATHEMATICA okQ[l_List] := Module[{lp= l^Range[Length[l]]}, Plus @@ Most[lp] == Last[lp]] Sort[FromDigits/@Select[Flatten[Table[Permutations/@Subsets[Range[9], {i} ], {i, 2, 9}], 2], okQ]] CROSSREFS Sequence in context: A044561 A169680 A177772 * A063329 A172465 A235109 Adjacent sequences:  A169735 A169736 A169737 * A169739 A169740 A169741 KEYWORD nonn,base,fini,full AUTHOR Harvey P. Dale, May 01 2010, May 04 2010 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified December 19 17:37 EST 2014. Contains 252238 sequences.